Telephone key expansion unit



FIG. 1 is a perspective view of the telephone key expansion unit of thepresent invention;

FIG. 2 is a top view;

FIG. 3 is a front elevational view;

FIG. 4 is a right-side elevational view;

FIG. 5 is a left-side elevational view;

FIG. 6 is a rear elevational view; and,

FIG. 7 is a bottom view.

The broken lines showing of a telephone in FIG. 1 is for illustrativepurposes only and forms no part of the claimed design.

The ornamental design for a telephone key expansion unit, as shown and described. 